Environmental Stability of Additively Manufactured Thermoplastic Polyamide Composites

As the adoption of additive manufacturing technologies for end-use parts continues to progress, the evaluation of environmental durability is essential for the qualification of manufactured articles in industries such as automotive, aerospace, and electrical. This study explores the effects of UV an...

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Bibliographic Details
Published in:Polymers 2023-08, Vol.15 (16), p.3385
Main Authors: Imburgia, Michael J., Faust, Jessica L., Ospina Buitrago, Johan, Enfield, Rachael E., Roy-Mayhew, Joseph D.
Format: Article
Language:English
Subjects:
3D printing
Additive manufacturing
Carbon fiber reinforced plastics
Carbon fibers
Clothing industry
Composite materials
Continuous fibers
Discount coupons
Exposure
Impact strength
Impact tests
Mechanical properties
Paints
Plastics
Polyamide resins
Polyamides
Polyurethane resins
Primers (coatings)
Printed materials
Printers
Protective coatings
Radiation
Testing laboratories
Thermoplastics
Water sprays
Xenon
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Summary:As the adoption of additive manufacturing technologies for end-use parts continues to progress, the evaluation of environmental durability is essential for the qualification of manufactured articles in industries such as automotive, aerospace, and electrical. This study explores the effects of UV and water-spray exposure on the mechanical properties of an additively manufactured polyamide 6 blend reinforced with short carbon fiber and continuous carbon fiber. Fused-filament-fabrication-printed test samples were exposed to a Xenon-arc UV source following ASTM G155 Cycle 1 conditions for a duration of 1000 h. Tensile, flexural, and Izod impact tests were performed on exposed and unexposed test samples. While Exposed tensile and flexural samples maintained their strength (84–100% and 88–100%, of Control samples, respectively), Izod impact strength increased (104–201% of Controls). This study also examines the influence of coatings and finds that samples coated with Krylon® Fusion All-In-One® and JetFlex® Polyurethane Primer maintain similar mechanical properties and exhibit a better visual appearance as compared to uncoated, exposed samples.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15163385